Improvement in wood-bending machines



G. KRIEBEL. WOOD BENDING MACHINE.

No. 50,602. Patented 001;. 24, 1865.

UNITED STATES PATENT OFFICE.

IMPROVEMENT IN WOOD-BENDJNG MACHINES.

Specification forming part of Letters Patent No. 50,602, datedOctober24, 1865.

To all whom it may concern:

Be it known that I, GEORGE KRIEBEL, of Hosensaclz, in the county ofLehigh and State of Pennsylvania, have invented a new and usefulImprovement in Machines for Bending Follies; and I do hereby declarethat the following is a full, clear, and exact description thereof,which will enable others skilled in the art to make and use the same,reference being had to the accompanying drawings, forming part of thisspecification, in which-- Figure 1 represents a plan or top view of thisinvention, partly in section. Fig. 2 is a front .elevation of the same.

Similar letters of reference indicate like parts.

This-invention relates to certain improvements in that class of machinesfor bending fellies, for which a patent has been granted to S. Moyer,March 20, 1860. In his machine the stick of wood to be bent for a i'ellyis laid into a metal strapand fastened by means of wedges to a mold,andby imparting to this mold a transverse sliding motion, the metal strap,together with the felly, is forced round the same by the action ofrollers, which are movable, and the position of which is changed as theoperation of bending the felly proceeds.

The invention which forms the subject-matter ofthis present inventionconsists in the use of hinged dogs which catch behind suitable shouldersat the ends of the metal straps, and which cause the clamp and felly tobend round the mold without requiring any change in their position.

A represents a table or platform, which is supported by suitable legs,B, and which is provided with a cavity th atforms the recess for thecarriage O.

A longitudinal sliding motion is imparted to the carriage by ascrew-spindle, I), which is rotated by a hand-wheel, E, or any othersuitable means,and the nutot' which is constructed of two parts, whichopen and close by the action of a hand-lever, F. By throwing thishand-lever in the direction of the arrow marked near it in Fig. 2 of thedrawings, the two parts of the nut are opened and the carriage is thrownout of gear with the feed-screw D. Said carriage is provided with a lip,a, and with a screw-clamp, b, which is operated by the hand-screw 0. Byturning this screw the clamp can be drawn up toward or moved back fromthe lip a and the mold G, together with the metallic strap 11, and with.the piece of wood to be bent, can be conveniently fastened getween thelip and clamp, as shown in Fig. I'of the drawings.

The strap d is provided at its ends with shoulders e, and as the mold,together with -of the carriage O. Hand-screws i serve to adjust theslides lz, together with the dogsf, according to the size of the moldused in the operation. When once adjusted, said slides remainstationary, and as the operation of bending proceeds the dogs turn ontheir shal'ts until the ends of the strap catch over the edges.

of the mold. I At that point the motion of the mold mustbe stopped, andclampsj, applied to the ends of the strap, hold the same in positiou sothat the carriage can be thrown out of gear with the feed-screw and themold can be removed, leaving the strap and felly on until the latterwill stay in the-sha' 'ie into which it has been brought by' the actionof the machine.

If a larger mold isto be used, the" dogs have to be set back, and if asmaller mold is to be used the dogs have to be movediu; but as long asthe size of the molds remains uniform the dogs, or, more properlyspeaking, the shafts which form the fulcra of the dogs, retain theirposition. 1

By the application of the hinged'dogsf the operation of bendin g felliesis considerably simplified, and after said dogs have been once adjustedthe machine can be worked without requiring much particular attention.

I claim as new and desire to secure by Letters Patent- The hinged dogsf, in combination with the mold G, to which the wood to be bent andstrap are fastened by a screw-clamp, and with the feed-screw 1),constructed and operating substantially as and for the purpose setforth.

GEORGE KRIEBEL.

Witnesses M. H. ALBRIGHT, EMMA J. ALBRIGHT.

